publication . Conference object . Article . 2018

Effect of matrix anisotropy on the apparent emitter orientation in organic LED

Norbert Danz; Nils Haase; Antonia Morherr; Christof Pflumm; Birk Fritsch; Dirk Michaelis;
Open Access English
  • Published: 22 May 2018
  • Country: Germany
Spontaneously aligning emitter molecules can improve the external efficiency of OLED devices and have been reported for different types of emitters doped into suitable hosts. Similar to the morphological alignment of the active molecules, a birefringence of the host affects the apparent emitter orientation. In order to investigate this effect experimentally, Ir(ppy)3 is co-evaporated into the emitting layer of OLED using hosts with different birefringence properties. Analyzing the electroluminescence emission patterns quantitatively reveals the apparent orientation distribution of the emitters. The results emphasize that host birefringence can be used to suppres...
arXiv: Physics::Accelerator Physics
free text keywords: organic light-emitting diode, electroluminescence, birefringence, emitter orientation, optical simulation, Dipole, Materials science, Electroluminescence, Common emitter, Anisotropy, Optoelectronics, business.industry, business, Perpendicular, Doping, OLED, Birefringence
Related Organizations
Funded by
Development of high-performance, hyperfluorescence OLEDs for use in display applications and solid state lighting
  • Funder: European Commission (EC)
  • Project Code: 732013
  • Funding stream: H2020 | RIA
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